Frances Clark

Data availability The SIAMESE (SIM) gene is At5g04470. The sim-1 and sim-3 alleles have been contributed to the Arabidopsis Biological Resource Center (https://abrc.osu.edu/) and are available there. The Cytrap and sim-1 Cytrap reporter lines used here are available from the corresponding author. Supporting Information Filename Description nph70947-sup-0001-Supinfo.pdfPDF document, 478.8 KB Fig. S1 Number of meristem cells and additional model predictions. Fig.